Merge branch 'maint-1.7.3' into maint
[git/git.git] / builtin / check-attr.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "attr.h"
4 #include "quote.h"
5 #include "parse-options.h"
6
7 static int all_attrs;
8 static int stdin_paths;
9 static const char * const check_attr_usage[] = {
10 "git check-attr [-a | --all | attr...] [--] pathname...",
11 "git check-attr --stdin [-a | --all | attr...] < <list-of-paths>",
12 NULL
13 };
14
15 static int null_term_line;
16
17 static const struct option check_attr_options[] = {
18 OPT_BOOLEAN('a', "all", &all_attrs, "report all attributes set on file"),
19 OPT_BOOLEAN(0 , "stdin", &stdin_paths, "read file names from stdin"),
20 OPT_BOOLEAN('z', NULL, &null_term_line,
21 "input paths are terminated by a null character"),
22 OPT_END()
23 };
24
25 static void output_attr(int cnt, struct git_attr_check *check,
26 const char *file)
27 {
28 int j;
29 for (j = 0; j < cnt; j++) {
30 const char *value = check[j].value;
31
32 if (ATTR_TRUE(value))
33 value = "set";
34 else if (ATTR_FALSE(value))
35 value = "unset";
36 else if (ATTR_UNSET(value))
37 value = "unspecified";
38
39 quote_c_style(file, NULL, stdout, 0);
40 printf(": %s: %s\n", git_attr_name(check[j].attr), value);
41 }
42 }
43
44 static void check_attr(const char *prefix, int cnt,
45 struct git_attr_check *check, const char *file)
46 {
47 char *full_path =
48 prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
49 if (check != NULL) {
50 if (git_check_attr(full_path, cnt, check))
51 die("git_check_attr died");
52 output_attr(cnt, check, file);
53 } else {
54 if (git_all_attrs(full_path, &cnt, &check))
55 die("git_all_attrs died");
56 output_attr(cnt, check, file);
57 free(check);
58 }
59 free(full_path);
60 }
61
62 static void check_attr_stdin_paths(const char *prefix, int cnt,
63 struct git_attr_check *check)
64 {
65 struct strbuf buf, nbuf;
66 int line_termination = null_term_line ? 0 : '\n';
67
68 strbuf_init(&buf, 0);
69 strbuf_init(&nbuf, 0);
70 while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
71 if (line_termination && buf.buf[0] == '"') {
72 strbuf_reset(&nbuf);
73 if (unquote_c_style(&nbuf, buf.buf, NULL))
74 die("line is badly quoted");
75 strbuf_swap(&buf, &nbuf);
76 }
77 check_attr(prefix, cnt, check, buf.buf);
78 maybe_flush_or_die(stdout, "attribute to stdout");
79 }
80 strbuf_release(&buf);
81 strbuf_release(&nbuf);
82 }
83
84 static NORETURN void error_with_usage(const char *msg)
85 {
86 error("%s", msg);
87 usage_with_options(check_attr_usage, check_attr_options);
88 }
89
90 int cmd_check_attr(int argc, const char **argv, const char *prefix)
91 {
92 struct git_attr_check *check;
93 int cnt, i, doubledash, filei;
94
95 argc = parse_options(argc, argv, prefix, check_attr_options,
96 check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
97
98 if (read_cache() < 0) {
99 die("invalid cache");
100 }
101
102 doubledash = -1;
103 for (i = 0; doubledash < 0 && i < argc; i++) {
104 if (!strcmp(argv[i], "--"))
105 doubledash = i;
106 }
107
108 /* Process --all and/or attribute arguments: */
109 if (all_attrs) {
110 if (doubledash >= 1)
111 error_with_usage("Attributes and --all both specified");
112
113 cnt = 0;
114 filei = doubledash + 1;
115 } else if (doubledash == 0) {
116 error_with_usage("No attribute specified");
117 } else if (doubledash < 0) {
118 if (!argc)
119 error_with_usage("No attribute specified");
120
121 if (stdin_paths) {
122 /* Treat all arguments as attribute names. */
123 cnt = argc;
124 filei = argc;
125 } else {
126 /* Treat exactly one argument as an attribute name. */
127 cnt = 1;
128 filei = 1;
129 }
130 } else {
131 cnt = doubledash;
132 filei = doubledash + 1;
133 }
134
135 /* Check file argument(s): */
136 if (stdin_paths) {
137 if (filei < argc)
138 error_with_usage("Can't specify files with --stdin");
139 } else {
140 if (filei >= argc)
141 error_with_usage("No file specified");
142 }
143
144 if (all_attrs) {
145 check = NULL;
146 } else {
147 check = xcalloc(cnt, sizeof(*check));
148 for (i = 0; i < cnt; i++) {
149 const char *name;
150 struct git_attr *a;
151 name = argv[i];
152 a = git_attr(name);
153 if (!a)
154 return error("%s: not a valid attribute name",
155 name);
156 check[i].attr = a;
157 }
158 }
159
160 if (stdin_paths)
161 check_attr_stdin_paths(prefix, cnt, check);
162 else {
163 for (i = filei; i < argc; i++)
164 check_attr(prefix, cnt, check, argv[i]);
165 maybe_flush_or_die(stdout, "attribute to stdout");
166 }
167 return 0;
168 }